For production runs, smaller sampling intervals might be required 

 in b, c and especially, c . 



4. Input Data. 



Input data, other than constants defined in MAIN, are read in 

 MAIN and are on IBM cards prepared according to the following list: 



(1) Card 1 



Number of mapping coefficients, number of 5 

 lines + 2, number of n lines, AS* in nautical 

 miles, first value of S* in nautical miles, 

 AT* in minutes, number of depths, number of 

 points in format 314, 3F5.1, 214. 



The value of g and B^ from the conformal 

 mapping solution in format 2E14.7. 



The NMAX cards containing the Fourier-type 

 transformation coefficients, B and C , 

 in format 2E14.7. " '^ 



Temporary storage for the ND values of the water 

 depth (fathoms) along a line from the seaward 

 boundary to the coast. This information is 

 needed to evaluate the traveltime coordinate T. 



5. Mathematical Procedures and Program Limitations. 



Information concerning the expanding grid procedure and the 

 relations transforming ^,V[ to S*,T* space is presented in 

 Volume I of this report. The user is required to know the coeffi- 

 cients of the expansion function 



NMAX, NUMXI, 

 NUMETA, DELSS, 

 SSTRT, DELTT, 

 ND, NS 



(2) Card 2 

 BETA BZRO 



(3) Card Group 3 

 COB,COC 



(4) Card Group 4 

 SY 



h 



= A + 



B(S*) 



for each region of the curve where S^ is arclength (nautical miles) 

 along the trans form- generated coastline. For the sample program, 

 there are five regions of the expansion curve. Selecting AS* = 

 6 nautical irtiles, the number of AS* intervals of each region and 

 the value of 3Sp/8S* at the end points of each region, we can 

 determine the coefficients of each region from three simultaneous 

 equations derived from the constraints: 



22 



